What is a Disposable Email Address?
A DEA, or disposable email address is a temporary, throw-away address that expires after a short period of time. DEA provider websites offer a service where users can generate a temporary email address (with about a 10 minute lifespan, for example). Some of the most common DEA providers are 10 Minute Mail, Guerrilla Mail, and Fake Inbox.
If your site prompts users to register before accessing specific content (such as a member area or an e-book), you probably attract a number of DEAs on your list as users try to sidestep the process. Since the address is real and DEAs deliver incoming messages, users can even click the link in your verification email to confirm that the address is valid. Then a few minutes later the email address self-destructs.